Chromosome - Wikipedia
A chromosome is a deoxyribonucleic acid molecule with part or all of the genetic material of an organism.Most eukaryotic chromosomes include packaging proteins which, aided by chaperone proteins, bind to and condense the DNA molecule to prevent it from becoming an unmanageable tangle.. Chromosomes are normally visible under a light microscope only when the cell is undergoing the metaphase of ...
What is a chromosome? - Genetics Home Reference - NIH
The short arm of the chromosome is labeled the “p arm.” The long arm of the chromosome is labeled the “q arm.” The location of the centromere on each chromosome gives the chromosome its characteristic shape, and can be used to help describe the location of specific genes.
chromosome | Structure & Function | Britannica.com
In species that reproduce asexually, the chromosome number is the same in all the cells of the organism. Among sexually reproducing organisms, the number of chromosomes in the body (somatic) cells is diploid (2n; a pair of each chromosome), twice the haploid (1n) number found in the sex cells, or gametes.
Chromosome | Definition of Chromosome at Dictionary.com
Chromosome definition, any of several threadlike bodies, consisting of chromatin, that carry the genes in a linear order: the human species has 23 pairs, designated 1 to 22 in order of decreasing size and X and Y for the female and male sex chromosomes respectively. See more.
Chromosome | Talking Glossary of Genetic Terms | NHGRI
A chromosome is an organized package of DNA found in the nucleus of the cell. Different organisms have different numbers of chromosomes. Humans have 23 pairs of chromosomes--22 pairs of numbered chromosomes, called autosomes, and one pair of sex chromosomes, X and Y.
Chromosome - definition of chromosome by The Free Dictionary
Define chromosome. chromosome synonyms, chromosome pronunciation, chromosome translation, English dictionary definition of chromosome. n. 1. A linear strand of DNA and associated proteins in the nucleus of eukaryotic cells that carries the genes and functions in the transmission of...
Chromosome | Definition of Chromosome by Merriam-Webster
Chromosome definition is - any of the rod-shaped or threadlike DNA-containing structures of cellular organisms that are located in the nucleus of eukaryotes, are usually ring-shaped in prokaryotes (such as bacteria), and contain all or most of the genes of the organism; also : the genetic material of a virus.
Chromosome | definition of Chromosome by Medical dictionary
chromosome [kro´mo-sōm] in animal cells, a structure in the nucleus, containing a linear thread of deoxyribonucleic acid (DNA), which transmits genetic information and is associated with ribonucleic acid and histones. In bacterial genetics, a closed circle of double-stranded DNA that contains the genetic material of the cell and is attached to the ...
Chromosome Map - Genes and Disease - NCBI Bookshelf
Our genetic information is stored in 23 pairs of chromosomes that vary widely in size and shape. Chromosome 1 is the largest and is over three times bigger than chromosome 22. The 23rd pair of chromosomes are two special chromosomes, X and Y, that determine our sex. Females have a pair of X chromosomes (46, XX), whereas males have one X and one Y chromosomes (46, XY).
Chromosome 3p- syndrome | Genetic and Rare Diseases ...
Chromosome 3p- syndrome is a rare chromosome abnormality that occurs when there is a missing copy of the genetic material located towards the end of the short arm (p) of chromosome 3. The severity of the condition and the signs and symptoms depend on the exact size and location of the deletion and which genes are involved. Some affected people ...